Telemetric system



C, J.- WEIBLE May 23, 1939.,

TELEMETRIC SYSTEM Filed May 28, 1937 2 Sheets-Sheet l FIG. I

INVENTOR CARL J. WEIBLE FIG. 2

y 23, 1939- c. .1. WEIBLE 2,159,413

TEL-EMETRIC SYSTEM Filed May 28. 1957 2 Shets-Sheet 2 r. if v X INVENTORF 6 BY CARL J. WEIBLE Patented May 23, 1939 PATENT OFFICE TELEMETRICSYSTEM Carl J. Weible, Cleveland, Ohio, assignor to Bailey MeterCompany, a Delaware corporation Application May 28, 1937, Serial No.145,278

14 Claims.

This invention relates to telemetric systems for remotely indicating orotherwise exhibiting the position of a movable transmitting member, andmore particularly to telemetric systems wherein the position of amovable transmitting member is exhibited at a plurality of remotereceiving stations.

One object of my invention is to provide a system for telemetering froma single transmitting station to a plurality of receiving stationswherein the receiving stations are arranged in cascade, so that aminimum of connecting wires is required between stations, and it is notnecessary .for the transmitter to supply energy for all of thereceivers.

A further object is to provide such a telemetric system wherein theoperation of all receivers is maintained in 'proper correspondence bysimple phasing means.

Further objects will be apparent from the description to follow and fromthe drawings, in which:

Fig. 1 is a diagrammatic representation of one embodiment of myinvention.

Fig. 2 is a front elevation of a reversing motor used in the embodimentof my invention shown in Fig. 1.

Fig. 3 is a side elevation of the reversing motor.

Fig. 4 is a diagram of the shading pole windings and connections of themotor shown in Figs. 2 and 3.

Fig. 5 is a diagrammatic illustration of a further embodiment of myinvention.

Fig. 6 is a front elevation of the motor preferably used in theembodiment of my invention shown in Fig. 5.

Fig'. 7 is a side elevation of the motor shown in Fi 6.

Referring to Fig. 1, I therein show a transmitting station generallyindicated at l, within which is a movable transmitting member 2, theangular position of which about a. pivot 3 it is desired to indicate orotherwise exhibit at a plurality of remote receiving stations generallyindicated at 4, 5 and 6. The member 2, for example, may be responsive toand positioned by and in accordance with the rate of flow of a fluid,the pressure or temperature of a body, a liquid level, an electromotiveforce, or other variable, the magnitude of which it is desired toexhibit at remote points; or it may be manually positioned to transmit.orders, commands or information to remote points. Cooperating with themovable member 2 is an index I which may be graduated in desired unitsso that the position of the movable member 2 will exhibit directly themagnitude of the variable being measured.

Within the remote receiving stations 4, 5 and 6 are movable members 8, 9and I0 having cooperating indices ll, l2 and I3 respectively. Throughthe agency of mechanisms hereinafter to be described the angularpositions of members 8, 9 and it are maintained in correspondence withthe angular position of the movable member 2, so that an observerlocated at any one of the receiving stations 4, 5 or 6 will immediatelybe advised of the position of the movable member 2. Generally speakingit may be said that such correspondence between the transmitting andreceiving members is obtained through arranging the receiving members inseries or in cascade and periodically correcting the position of thefirst receiving member in the series to bring it into agreement withthat of the transmitting member, periodically correcting the position ofthe second receiving member in the series to bring it into agreementwith the position of the first receiving member, and continuing suchoperation, that is periodically correcting the position of eachreceiving member to bring it into agreement with the position of thepreceding receiving member in the series, to the end of the series.Specifically referring to Fig. 1, the position of the receiving member 8is periodically corrected to bring it into agreement with the positionof the transmitting member 2, the position of the receiving member 9 isperiodically corrected to bring it into agreement with that of thereceiving member 9, and the position of the receiving member III. isperiodically corrected to bring it into agreement with that of thereceiving member 9. While in Fig. l but three receiving stations havebeen illustrated, it will be obvious that in accordance with myinvention any number of receiving stations so arranged in series may beactuated from a single transmitting member.

Within the transmitting station I is a substantially uniform rise cam l4rotated at constant speed by a motor l5. Within the receiving stations4, 5 and 6 are similarly shaped cams l6, l1 and I8 rotated by motors I9,20 and 2| respectively. Periodically reciprocated by cams I4, I6, I! andI8 are pivoted members 22, 23, 24 and 25 carrying contacts 26, 21, 28and 29 respectively.

Positioned by and in accordance with the transmitting member 2 is apivoted member 30 carrying a contact 3i arranged to be engaged by thecontact 26. Within the receiving stations 4, 5 and 9 are similar pivotedmembers 92, 39 and 34 carrying contacts 35, 36, 31 and positioned by andin accordance with the associated receiving members 8, 9 and Irespectively.

The cams I4, I6, I! and i8 are rotated at identical speeds and in exactphase, so that at any instant the point on the contour of cam 04 engagedby the member 22 is the same as that engaged by members 23, 24 and oncams l6, H and I8. Accordingly if the position of the receiving member 8is in agreement with that of the transmitting member2 the contact 211will engage the contact at the same instant as the contact 26 engagesthe contact 3i. Likewise due to the series arrangement of the receiversl, 5 and 6, if the member 9 is in correct correspondence with the member6 then contacts 26, 36 will engage at the same instant as do contacts27, and if the movable member i6 is in proper correspondence with themember 9 then contacts 3'17 will engage at the sameinstant as docontacts 36. If, however, there is a change in the position of member 2,then the instant at which the contact 26 engages the contact ill willlead or lag the instant at which the contacts 2?, 35 engage by an amountproportional to the change in position of the member 2 and dependingupon the sense of the change in position. The position of the movablereceiving member 6 will then be corrected by an amount proportional tothe change in the position of the transmitting member 2 and willaccordingly be restored to proper correspondence therewith. Thereafterthe movable member 9 will be brought into proper correspondence with themember 8 and the member ill in proper correspondence with the member 9in the order stated.

In Fig. l the members 9, 9 and it are diagrammatically shown as beingpositioned by reversible motors 36, 36 and 46 respectively. These motorshave opposed wound shading poles and a continuously excited field. Asshown in Figs. 2 and 3, the motors are provided with an integral speedreduction unit 4i, so that several revolutions of the armature 42 arerequired to position the drive shaft 43 through a relatively smallangle. As shown in Figs. 2 and 4, the opposed poles are split into twoparts 44, 45 and 46, 42. Rotation of the motor in one direction isaccomplished by short circuiting the windings 44 and 45. R0- tation inthe opposite direction is accomplished by short circuiting the windings46 and. With windings 44, 45 and 46, 42 open circuited, orsimultaneously short circuited, the motor remains stationary and is noturged to rotation in either direction.

In Fig. 1 the opposed wound shading poles of the motor 38 are showndiagrammatically at 49 and 50. The shading pole 50 is energized uponclosure of the contacts 26, 3I whereas the shading pole 49 is energizedupon closure of the con-' tacts 21, 35. When contacts 26, 3i and 2?, 35engage at the same instant, both poles 49 and 50 are energized and themovable member 6 remains stationary. If contacts 26, 3| engage beforecontacts 21, 35, then the member 8 will be positioned in ,one direction.If contacts 21, 35 engage before contacts 26, BI then the member 8 willbe positioned in the opposite direction. Such positioning will continueuntil the lagging pair of contacts engage, when the member 8 will bebrought to a substantially instantaneous stop and remain stationaryuntil the next revolution of cams I4 and I6, when it will again bepositioned if not in proper correspondence with the position of themovable member 2.

To provide for simultaneous deenergization of poles 49 and 50, connectedin the neutral is a mercury switch 5I positioned through link 52 bymember 23. At a predetermined point in the travel of member 23 theswitch 5I is thrown, opening the circuit through poles 49 and 50. Uponreturn of member 23 to a second predetermined position the switch 5| isthrown in opposite direction so that the poles 49 and 59 may beenergized through engagement of contacts 26, 3i and/or ill, 35. Theswitch 5| is preferably arranged to close before contacts 26, 3t or 27,35 can engage regardless of the positions of members 2 or 6, andlikewise to open circuit after contacts 26, 3I or 27, 35 have engagedregardless of the position of movable member 2 or 6. In other words,energization of the poles 49 and 56 is controlled by contacts 26, 3| and22, 25 respectively, whereas deenergization is controlled by the switch5i.

The motors and Ml have opposed wound shading poles diagrammaticallyillustrated at 53,

54 and 55, respectively. The pole 54 is energized upon closure ofcontacts 27;, 35, whereas the pole 53 is energized upon closure ofcontacts 28, 36. Similarly the pole 56 is energized upon closure ofcontacts 26, 36 and the pole upon closure of contacts 29, 27!.Accordingly, it is apparent that periodically, once every revolution ofthe cams El i, l6, Ill and it the position of the movable member 8 iscompared with that of the movable member 2, that of the movable member 9with that of the movable member 8, and that of the movable member illwith that of the movable member 9, and if upon such comparison they arenot found in proper correspondence then the motors 36, 36 and 46 areoperated in one directionor another to bring them into suchcorrespondence.

'Connected in the neutral of the opposed wound shading poles of motor 39is a mercury switch till and in the neutral of motor 40 a similar switch56. As hereinbefore explained with reference to motor 38, switches 52and 58 are arranged to close and open circuit at predetermined points inthe travel of members 24 and 25 respectively.

Due to changes in relative friction between motors I5, I 9, 20 or 2i, orupon these motors being energized after a power failure cams I 4, 66, I1 and/or I8 may depart from proper phase relationship. In order thatthey be restored to proper phase relationship I provide means wherebythe angular position of the cam I6 is periodically compared with theposition of cam I4 and if not in agreement the motor I9 is momentarilyperiodically stopped until proper agreement is restored.Correspondingly, the position of the cam I! is periodically comparedwith that of the cam I6 and corrected if found necessary, and theposition of the cam I8 compared with that of the cam IT, and likewisecorrected if found necessary.

Carried by the member 30 is a contact 60 arranged to engage a contact 6Icarried by a pivoted member 62 when the member 22 engages a projection63 on .cam I4. Contacts 60, 6| are connected in circuit with motor I9and upon closure will energize it. Also connected in circuit with motorI9 and in parallel with contacts 60, M are normally closed contacts 64,65. Likewise, when -engaged, serving to energize motor I9. Contacts 64,65 are disengaged when member 23 engages a projection 66 on cam I6. Innormal operation the motor I9 is energized through contacts 64, 65except when member 28 engages projection 66. If cams i4 and it are inproper phase relationship at the instant when contacts 64, aredisengaged, contacts Oil, 6| are engaged, thereby establishingcontinuous energization oi the motor i9. However, if cam I6 is displacedfrom proper phase relationship with respect to cam I, such simultaneousand instantaneous action between contacts Bl, BI and 84, 85 will notoccur, thereby eflecting deenergization of motor is, causing the cam Itto remain stationary until proper phase relationship is re,- stored.Such is the action when the cam ll leads the cam it. However, when thecam ll lags the cam IS the motor I! will be periodically stopped onceeach revolution for a small increment oi time until proper phaserelationship is restored.

The motor 20 is controlled in similar fashion through contacts 68, 61and ll, 69. In this instance the position of the cam I I is compared tothe position of the cam II and i! found difi'erent is periodicallyadjusted to maintain proper phase relationship. Contacts III, II and 12,I3 likewise control actuation of motor 2| to maintain cam It in properphase relationship with respect to cam ll.

In Fig. 5 I have shown a further embodiment of my invention wherein themovable members 8, 9 and III are positioned by reversible self-startingsynchronous motors having opposed fields. As shown, the members 8, 9 andID are positioned by motors I4, 15 and I8 respectively, shown in greaterdetail in Figs. 6 and 7. The motor has opposed fields 11 and I8. Whenthe field I1 is energized the motor rotates in one direction and whenthe field 18 is energized the motor rotates in opposite direction. Withboth fields energized or deenergized the motor is not urged to rotationin either direction. The motor contains an integral gear reduction 19 sothat the positioning shaft rotates through a small angle for severalrevolutions of the motor armature. The fields 11, I8 are arranged to beconnected across a suitable source of potential and energization is notestablished through short circuiting of the windings as is the case withthe motor shown in Figs. 2, 3.

The motor 14 positioning the member 8 is provided with fields 8| and 82,the former being controlled by contacts 26, 3| and the latter bycontacts 21, 35. Similarly the motor 15 is provided with fields 83, 84and the motor 16 with fields B5, 86. The field 83 is controlled bycontacts 21, 35 and the field 84 by contacts 28, 3B. The field 85 iscontrolled by contacts 20, 36 and the field 86 by contacts 29, 31. It isapparent therefore that the principal of operation of the modificationof my invention shown in Fig. 5 is substantially the same as that shownin Fig. 1. In the former the contacts serving to short cir-, cult theopposed pole windings of a reversible motor, in the latter serving toenergize the fields of a self-starting reversible synchronous motor.

While I have illustrated and described certain specific embodiments of-my invention, it is to be understood that I am not to be limitedthereby.

What I claim as new, and desire to secure by Letters Patent oi theUnited States, is:

1. In a telemetric system for positioning a plurality of remoteindicators in accordance with the positioning of a transmitting member,in combination, a movable transmitting member, a plurality of movablereceiving members, a separate reversible motor having opposed windingsfor positioning each of said receiving members,

means under the control of said movable transmitting member forenergizing a winding of one of said reversible motors, means under thecontrol of the associated receiving member for energizing the opposedwinding of said one of said reversible motors and a winding of anotherof said reversible motors, and means under the control of the receivingmember associated with said last named motor for energizing the opposedwinding.

2. In a telemetric system for positioning a plurality of remoteindicators in accordance with the positioning of a transmitting member,in combination, a movable transmitting member, a plurality of movablereceiving members, a separate reversible motor having opposed woundshading poles for positioning each of said receiving members, meansunder the control of said movable transmitting member for energizing awinding of one of said reversible motors, means under the control of theassociated member for energizing the opposed winding oisaid one of saidreversible motors and a winding of another of said reversible motors,and means under the control of the receiving member associated with saidlast named motor for regulating the energizatlon of the opposed winding.

3. In a telemetric system for positioning a plurality of remoteindicators in accordance with the positioning of a transmitting member,in combination, a. movable transmitting member, a plurality of movablereceiving members, a separate reversible motor having opposed fields forpositioning each of said receiving members, means under the control ofsaid movabletransnritting member for energizing a. field of one of saidreversible motors, means under the control of the associated receivingmember for energizing the opposed field of said one of said reversiblemotors and a field of another of said reversible motors, and means underthe control of the receiving member associated with said last namedmotor for regulating the energization of the opposed field.

4. In a telemetric system for maintaining angular agreement between thepositions of a plurality of remote receiving members and the angularposition of a transmitting member, in combination, a transmitting memberangularly displaceable from an initial position, a plurality ofreceiving members each angularly displaceable from a correspondinginitial position, means for periodically positioning one of saidreceiving members proportional to the difference between the angularposition of said transmitting member and said receiving member, andmeans for periodically positioning another of said receiving membersproportional to the difference between the angular position of saidfirst named receiving member and said last named receiving member.

5. In a telemetric system for positioning a plurality of remoteindicators in accordance with the positioning of a transmitting member,in combination, a movable transmitting member, a plu rality of movablereceiving members, a separate reversible motor having opposed windingsfor p0- sitioning each of said receiving members, cyclically operablemeans controlled by said transmitting member for periodically energizinga winding of one of said reversible motors, cyclically operable meanscontrolled by the associated receiving member for periodicallyenergizing the opposed winding of said one of said reversible motors anda winding of another of said reversible motors, and cyclically operablemeans controlled by the receiving member associated with said last namedmotor for periodically energizing the opposed winding of said last namedreversible motor.

6. In a telemetric system for positioning a plurality of remoteindicators in accordance with the positioning of a transmitting member,in combination, a transmitting station and a plurality of receivingstations, a continuously rotating cam and motor for rotating each camlocated at said transmitting station and each of said receiving stationsand means for maintaining said cams in predetermined phase relationshipcomprising, means for energizing one of said receiving motors for apredetermined portion of each revolution under the control of the camdriven by said receiving motor, means for energizing said receivingmotor for the remainder of each revolution under the control of saidtransmitting cam, means forenergizing a second receiving motor for apredetermined portion of each revolution of its driven cam and means forenergizing said second receiving motor for the remainder of eachrevolution under the control of said first receiving motor.

7. In a telemetric system for positioning a series of remote indicatorsin accordance with the positioning of a transmitting member, incombination, a series of remote indicators, a separate reversible motorhaving opposed windings for actuating each of said remote indicators,means under the control of said transmitting member for energizing awinding of the reversible motor actuating the first of said series ofindicators and means under the control of each of said remote indicatorsfor controlling the energizing of a winding of its associated reversiblemotor and a winding of the reversible motor associated with thesucceeding remote indicators in said series.

8. In a telemetric system for positioning a series of remote indicatorsin accordance with the positioning of a transmitting member, incombination, a series of remote indicators, a separate reversible motorhaving opposed windings for actuating each of said remote indicators,cyclically operable means associated with each of said remoteindicators, means under the joint control of said transmitting memberand the associated cyclically operable means for periodically energizinga winding of the reversible motor driving the first of said series ofremote indicators, and means under the joint control of each of saidremote indicators and the cyclically operable means associated therewithfor periodically energizing a winding of its driving reversible motorand a winding of the reversible motor associated with the succeedingremote indicator in said series.

9. In a telemetric system for positioning a series of remote indicatorsin accordance with the positioning of a transmitting member, incombination, a transmitting member and a plurality of receiving members,a separate reversible motor having opposed windings for actuating eachof said receiving members, a continuously rotating cam associated witheach of said receiving members and said transmitting member, all of saidcams having identical contours, means for driving said cams inpredetermined phase relationship, contact means under the joint controlof said transmitting cam and the transmitting member for energizing awinding of the reversible motor positioning the first of said series ofreceiving members, a contact means under the joint control of each ofsaid receiving members and the associated cam for energizing a windingof the reversible motor associated therewith and a winding of thereversible motor associated with the succeeding receiving member,whereby each of said receiving members is periodically positioned for atime length proportional to the difference in time the opposed windingsof the associated reversible motor are energized.

10. In a telemetric system, transmitting means for cyclicallytelemetering signals of a time duration corresponding to a variable,-afirst receiver means, a movable member in said first receiver means,means including means responsive to said signals for causing said memberto assume a position corresponding to the time duration of said signals,means for cyclically telemetering signals of a time durationcorresponding to the position of said movable member, a second receivermeans, a second movable member in said second receiver means, and meansincluding means responsive to said last named signals for causing saidsecond member to assume a position corresponding to the time duration ofsaid last named signals.

11. In a telemetric system for maintaining correspondence of positionbetween a plurality oi remote receiver members and a transmittingmember, in combination, a movable transmitting member, a plurality ofmovable receiving members, a separate reversible motor having opposedwindings for positioning each of said receiving members, means under thecontrol of said transmitting member for cyclically energizing a windingof one of said reversible motors for a time duration corresponding tothe position of said transmitting member, means under the control of themovable receiving member associated with said one of said reversiblemotors for cyclically energizing the opposed winding of said one of saidreversible motors and a winding of another of said reversible motors fora time duration corresponding to the position of said associated member,and means under the control of the movable member associated with saidlast named member for cyclically energizing the opposed winding of saidlast named motor for a time duration corresponding to the position ofsaid last named member.

12. In a telemetric system for maintaining correspondence of positionbetween a plurality of remote receiving members and a transmittingmember, in combination, a movable transmitting member, a plurality ofmovable receiving members, means for periodically originating signals ofa time duration corresponding to the position of said transmittingmember, means including means responsive to said signals for moving oneof said receiving members to maintain the position assumed thereby inpredetermined ratio to the duration of said signals, means forcyclically originating signals of a time duration corresponding to theposition of said one of said receiving members, and means includingmeans responsive to said last named signals for moving another of saidreceiving members to maintain the position assumed thereby inpredetermined ratio to the duration of said last named signals.

13. In a telemetric system for 'maintaining agreement between thepositions of a plurality of remote receiving members and the position ofa transmitting member which is positioned between limits incorrespondence with changes inv the magnitude of a variable, incombination, a transmitting member displaceable toward and away from aninitial position in correspondence to decreases and increases in themagnitude of a variable, a plurality of receiving members eachdisplaceable toward and away from a corresponding initial position,means for periodically positioning one of said receiving membersproportional to the difference between the position of said transmittingmember and said receiving member in a direction to restorecorrespondence of position between said members, and means forperiodically positioning another of said receiving members proportionalto the difi'erence between the position of said first named receivingmember and said last named receiving member and in a direction torestore correspondence of position therebetween.

14. In a telemetric system for maintaining agreement between thepositions of a plurality of remote receiving members and the position ofa transmitting member which is positioned between limits incorrespondence with changes in the magnitude of a variable, incombination, a transmitting member displaceable toward and away from aninitial position in correspondence to decreases and increases in themagnitude of a variable, a plurality of receiving members eachdisplaceable toward and away from a corresponding initial position,means including means responsive to the position of said transmittingmember for positioning one of said receiving members toward and awayfrom its initial position to maintain the position thereof incorrespondence with the position of the transmitting member, and meansincluding means responsive to the position of said first named receivingmember for positioning another of said receiving members toward and awayfrom its initial position to maintain the position thereof incorrespondence with the position of said first named receiving member.

CARL J. WEIBLE.

